Siding boards attachment structure

ABSTRACT

This invention provides a siding boards attachment structure excellent in external appearance, weather resistance and construction efficiency in which a plurality of siding boards or external wall members are secured to a structural body of a building with securing members in a rabbet joint manner. The securing member is secured to the structural body in a state in which an upper side lower-ledge formed at an upper edge of the external wall member to be disposed at an internal side is engaged with a lower side upper-ledge formed at a lower edge of the external wall member to be disposed at an external side. A cut end portion is secured to the structural body with an end portion securing member.

This application claims priority under 35 U.S.C. §119 to Japanese Patent Application No. P2005-19499 filed on Jan. 27, 2005, the entire disclosure of which is incorporated herein by reference in its entirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The preferred embodiments of the present invention relate to a siding boards attachment structure for securing external walls to a structural body such as a building frame with securing members in a rabbet joint manner.

2. Description of the Related Art

The following description sets forth the inventor's knowledge of related art and problems therein and should not be construed as an admission of knowledge in the prior art.

FIGS. 15 and 16 illustrate a conventional siding boards attachment structure 9 in which external wall members 92 are secured to furring strips 93 fixed to a structural body 90 such as columns or girths. In this siding boards attachment structure 9, the lower side upper-ledge 922 of the external wall member 92 to be disposed at an upper side and the upper side lower-ledge 921 to be disposed at a lower side are engaged with a fastening or securing member 95. The securing member 95 is secured to the furring strip 93 fixed to the structural body 90 with screws 94. Thus, the external wall members 92 are secured to the structural body 90 via the furring strips 93.

As shown in FIG. 15, the securing member 95 having a base plate portion 951 is secured to the furring strip 93 so as to form a prescribed space between the contacting face of the external wall member 92 and the contacting face of the furring strip 93 in a state in which the base plate portion 951 is in contact with the rear side surface 926 of the external wall member 92. In this secured state, a ventilation space 901 exists between the furring strip 93 and the external wall member 92.

In the aforementioned siding boards attachment structure 9, however, there is a portion where the securing member 95 cannot be used. For example, as shown in FIG. 16, in the case of the external wall member 92 to be disposed at the assortment portion connecting with the lower roof 902 of the building, the external wall member 92 is cut to adjust the width (see Japanese Patent No. 3501224). In this size adjusting external wall member 920 with a cut end portion 923, since the lower side upper-ledge 922 (see FIG. 15) formed at the lower edge of the external wall member 92 is cut, the lower end portion of this size adjusting external wall member 920 cannot be secured using the aforementioned securing member 95.

Accordingly, the cut end portion 923 of the size adjusting external wall member 920 is secured to the furring strip 93 horizontally fixed to the structural body 90 by putting in a nail 99 from the surface side. In this state, since the securing member 95 is engaged with the upper side lower-ledge 921 at the upper side of the size adjusting external member 920, a spacer 98 is disposed between the size adjusting external wall member 920 and the furring strip 93 to make the external construction surface flush with each other.

However, the nailing against the size adjusting external wall member 920 causes a deterioration of the appearance. In other words, although the securing members 95 are used to create the excellent appearance of the external wall, nailing is required to secure certain portions where the securing member cannot be used, resulting in deteriorated external appearance.

Furthermore, the nailed portion requires patching coating to improve the external appearance, causing deteriorated construction efficiency, which in turn causes increased construction costs. In addition, the nailing may cause cracks of the external wall member and/or water leakage. Especially, in cases where a hard member such as a fired material is used as the external wall member, the nailing may cause damages such as cracks to the external wall member.

The aforementioned problems may arise not only at an assortment portion connecting with a lower roof, but also at another portions, e.g., an upper or lower side of an opening portion, or an overhang portion, using a size adjusting external wall member.

The description herein of advantages and disadvantages of various features, embodiments, methods, and apparatus disclosed in other publications is in no way intended to limit the present invention. For example, certain features of the preferred embodiments of the invention may be capable of overcoming certain disadvantages and/or providing certain advantages, such as, e.g., disadvantages and/or advantages discussed herein, while retaining some or all of the features, embodiments, methods, and apparatus disclosed therein.

SUMMARY OF THE INVENTION

The preferred embodiments of the present invention have been developed in view of the above-mentioned and/or other problems in the related art. The preferred embodiments of the present invention can significantly improve upon existing methods and/or apparatuses.

Among other potential advantages, some embodiments can provide a siding boards attachment structure excellent in external appearance, weather resistance and construction efficiency.

According to some embodiments of the present invention, in a siding boards attachment structure in which a plurality of external wall members or siding boards are secured to a structural body of a building with securing members in a rabbet joint manner,

the securing member is secured to the structural body in a state in which an upper side lower-ledge formed at an upper edge of the external wall member to be disposed at an internal side is engaged with a lower side upper-ledge formed at a lower edge of the external wall member to be disposed at an external side,

wherein as to a size adjusting external wall member having a cut end portion for adjusting its width among the plurality of external wall members, the cut end portion is secured to the structural body with an end portion securing member,

wherein the end portion securing member is provided with a backboard portion to be secured to the structural body and a forwardly bent portion forwardly bent from one edge of the backboard portion,

wherein the backboard portion of the end portion securing member is in contact with a rear side surface of the size adjusting external wall member and the forwardly bent portion of the end portion securing member is in contact with the cut end face of the size adjusting external wall member, and

wherein the backboard portion and the rear side surface of the size adjusting external wall member are bonded to each other with adhesive agent.

In the aforementioned siding boards attachment structure 1, the cut end portion of the size adjusting external wall member is secured to the structural body using the aforementioned end portion securing member. Accordingly, it is not required to execute nailing operations at the cut end portion. This can ensure an excellent external appearance design. In other words, since all of external wall members 2 including the cut end portion of the size adjusting securing member can be secured with securing members, excellent appearance can be obtained.

Furthermore, since a nailing operation is not required at the cut end portion, it is not required to execute later patching coating required in the case of nailing, resulting in improved construction efficiency and decreased construction costs. Furthermore, since there is no fear of damaging the external wall member 2, the weather resistance of the external wall member 2 can be ensured sufficiently. As mentioned above, it is possible to provide a siding boards attachment structure excellent in external appearance, weather resistance and construction efficiency.

In some embodiments, the external wall member can be made of, for example, ceramic series material, which makes it possible to use as a horizontal external wall member. The end portion securing member can be formed into, for example, an elongated shape with an upper-to-lower width of 40 to 80 mm and a right-to-left width of 900 to 3,030 mm.

In some embodiments of the present invention, the cut end portion of the size adjusting external wall member can be inclined with respect to a right and left width direction of the size adjusting external wall member, and the end portion securing member can be disposed along the cut end portion in an inclined state with respect to the right and left width direction of the size adjusting external wall member.

In this case, the cut end portion to be disposed in an inclined state can be easily secured to the structural body with the end portion securing member, resulting in a siding boards attachment structure excellent in external appearance, weather resistance and construction efficiency.

In some embodiments, the size adjusting member can be disposed at a flowing side assortment portion connecting with a lower roof of the building, and the cut end portion of the size adjusting external wall member can be secured to the structural body with the end portion securing member.

In this case, at the flowing side assortment portion connecting with a lower roof, the external appearance and weather resistance can be enhanced.

In some embodiments, the size adjusting external wall member can be disposed at a building side assortment portion connecting with a lower roof of the building, an upper or lower side of an opening portion, or an overhang portion, and the cut end portion of the size adjusting external wall member can be secured to the structural body with the end portion securing member.

In this case, at each portion, the external appearance and weather resistance can be enhanced.

In some embodiments, it is preferable that the securing member and the end portion securing member are secured to a furring strip fixed to the structural body.

In this case, a sufficient ventilation layer can be created behind the external wall member, resulting in a siding boards attachment structure with more durability.

In some embodiments, it is preferable that the securing member has a base plate portion which comes into contact with the rear side surface of the external wall member, and the backboard portion of the end portion securing member and the base plate portion of the securing member have approximately the same front-to-rear width.

In this case, the size adjusting external wall member can be secured to the structural body 10 in parallel without causing any stepped or uneven portion.

It is preferable that the external wall member is a ceramic series external wall member made of fired material.

In this case, since it is difficult to execute the nailing, the functions and effects of the present invention using the present invention can be exerted sufficiently.

The above and/or other aspects, features and/or advantages of various embodiments will be further appreciated in view of the following description in conjunction with the accompanying figures. Various embodiments can include and/or exclude different aspects, features and/or advantages where applicable. In addition, various embodiments can combine one or more aspects or features of other embodiments where applicable. The descriptions of aspects, features and/or advantages of particular embodiments should not be construed as limiting other embodiments or the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The preferred embodiments of the present invention are shown by way of example, and not limitation, in the accompanying figures, in which:

FIG. 1 is a cross-sectional view showing a siding boards attachment structure according to a first embodiment of the present invention;

FIG. 2 is a perspective view showing the siding boards attachment structure according to the first embodiment of the present invention;

FIG. 3 is an explanatory view showing a partial construction of the external wall structure;

FIG. 4 is a cross-sectional view showing the fixing state of the normal external wall member according to the first embodiment of the present invention;

FIG. 5A is a front view showing an end portion securing member according to the first embodiment of the present invention;

FIG. 5B is a side view showing the end portion securing member according to the first embodiment of the present invention;

FIG. 5C is a bottom view showing the end portion securing member according to the first embodiment of the present invention;

FIG. 6 is a perspective view showing a building according to the first embodiment of the present invention;

FIG. 7 is a perspective view showing a siding boards attachment structure according to a second embodiment of the present invention;

FIG. 8 is a cross-sectional view showing the siding boards attachment structure according to the second embodiment of the present invention;

FIG. 9 is a perspective view showing a siding boards attachment structure according to a third embodiment of the present invention;

FIG. 10 is a cross-sectional view showing the siding boards attachment structure according to the third embodiment of the present invention;

FIG. 11 is a perspective view showing a siding boards attachment structure according to a fourth embodiment of the present invention;

FIG. 12 is a cross-sectional view showing the siding boards attachment structure according to the fourth embodiment of the present invention;

FIG. 13 is a perspective view showing a siding boards attachment structure according to a fifth embodiment of the present invention;

FIG. 14 is a cross-sectional view showing the siding boards attachment structure according to the fifth embodiment of the present invention;

FIG. 15 is a cross-sectional view showing the securing status of the external wall member according to a related art; and

FIG. 16 is a perspective view showing the siding boards attachment structure according to a related art.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

In the following paragraphs, some preferred embodiments of the invention will be described by way of example and not limitation. It should be understood based on this disclosure that various other modifications can be made by those in the art based on these illustrated embodiments.

Embodiment 1

A siding boards attachment structure according to a preferable embodiment of the present invention will be explained with reference to FIGS. 1 to 6.

In the siding boards attachment structure 1 of this embodiment, as shown in FIGS. 1 and 4, a plurality of siding boards or external wall members 2 are secured to the structural body 10 with fastening or securing members 5 in a rabbet joint state. The fastening or securing member 5 is fixed to the structural body 10 in a state in which the upper side lower-ledge 21 formed at the upper edge of the external wall member 2 to be disposed at the internal side is engaged with the lower side upper-ledge 22 formed at the lower edge of the external wall member 2 to be disposed at the external side.

As shown in FIGS. 1 to 3, among the aforementioned plural external wall members 2, the size adjusting external wall member 20 with a cut end portion 23 for adjusting the width is formed by cutting the lower side upper-ledge 22. Accordingly, the lower side of the size adjusting external wall member 20 cannot be secured with the securing member 5. Therefore, the cut end portion 23 of the size adjusting external wall member 20 is secured to the structural body 10 via an end portion securing member 3.

As shown in FIGS. 1, 2 and 5, the end portion securing member 3 is provided with a backboard portion 31 to be secured to the structural body 10 and a forwardly bent portion 32 forwardly bent from one end of the backboard portion 31. This end portion securing member 3 supports the cut end face 231 in a state in which the backboard portion 31 is in contact with the rear side surface 26 of the size adjusting external wall member 20 and the forwardly bent portion 32 is in contact with the cut end face 231. The backboard portion 31 and the rear side surface 26 of the size adjusting external wall member 20 are bonded with an adhesive agent 11.

As shown in FIGS. 1-3 and 6, the size adjusting external wall member 20 is disposed at the flowing side assortment portion 101 connecting with the lower roof 12 of the building. In this case, as shown in FIGS. 3 and 6, the cut end portion 23 of the size adjusting external wall member 20 is inclined with respect to the right and left width direction of the size adjusting external wall member 20. Along this inclined cut end portion 23, the aforementioned end portion securing members 3 are disposed. Accordingly, the end portion securing member 3 is also secured in an inclined state with respect to the structural body 10.

As shown in FIGS. 1, 2 and 4, the securing member 5 and the end portion securing member 3 are secured to the structural body 10 via a furring strip 13. Concretely, the securing member 5 is secured to the structural body 10 via the vertical furring strip 131, and the end portion securing member 3 is secured to the horizontal furring strip 132 fixed to the structural body 10. However, the end portion securing member 3 can be directly secured to the vertical furring strip 131 without using the horizontal furring strip 132.

The securing member 5 is provided with a base plate portion 51 which comes into contact with the rear side surface 26 of the external wall member 2 and is secured to the structural body 10, a supporting portion 52 forwardly protruded from the base plate portion 51, an upper plate engaging portion 53 obliquely upwardly bent from the supporting portion 52, and a lower plate engaging portion 54 obliquely downwardly bent from the supporting portion 52.

As shown in FIG. 4, by the securing member 5, the upper side lower-ledge 21 of the external wall member 2 is engaged with the lower plate engaging portion 54, the lower side upper-ledge 22 of the external wall member 2 is supported by the supporting portion 52 and engaged with the upper plate engaging potion 53. More concretely, the upper plate engaging portion 53 is engaged with a rear engaging portion 221 formed behind the lower upper-ledge 22 of the external wall member 2. The securing member 5 is secured to the vertical furring strip 131 fixed to the structural body 10 with screws 56.

As shown in FIG. 1, the backboard portion 31 of the end portion securing member 3 and the base plate portion 51 of the securing member 5 have approximately the same front-to-rear width. That is, the front-and-rear-width d1 of the backboard portion 31 (see FIG. 5) and the front-to-rear width d2 of the base plate portion 51 (see FIG. 4) have approximately the same size (e.g., about 5 mm). As shown in FIG. 4, the base plate portion 51 of the securing member 5 is provided with a base contact portion 511 which comes into contact with the furring strip 13 as a base member and a rear side contact portion 510 forwardly raised with respect to the base contact portion 511 so as to come into contact with the rear side surface of the external wall member 2. The front-to-rear width between the base contact portion 511 and the rear side contact portion 510 constitutes the front-to-rear width d2 of the base plate portion 51.

As shown in FIGS. 1 and 5, the backboard portion 31 of the end portion securing member 3 is provided with a first contact portion 311 and a second contact portion 312 which come into contact with the furring strip 13 at the forwardly bent portion side and at the opposite side thereof, respectively, and a rear surface contact portion 310 forwardly raised between the first contact portion 311 and the second contact portion 312. The front-to-rear width between the first and second contact portions 311 and 312 and the rear surface contact portion 310 constitutes the front-to-rear width d1 of the backboard portion 31.

As shown in FIGS. 1 and 4, formed between the external wall member 2 and the furring strip 13 is a ventilation layer 18 with a distance (e.g., about 5 mm) which is the same as the front-to-rear width d1 of the backboard plate portion 31 of the end portion securing member 3 and the front-to-rear width d2 of the backboard portion 51 of the securing member 5.

The end portion securing member 3 can be formed by bending a metal plate such as an plating steel sheet with a thickness t of about 1.2 mm. The end portion securing member 3 can be formed into, for example, an elongated configuration with the right-to-left width w of about 1,836 mm, and the up-to-down width h of about 60 mm. The front-to-rear width d1 of the backboard portion 31 can be about 5 mm, and the length a of the forwardly bent portion 32 can be about 13 mm. Accordingly, the end portion securing member 3 can support the cut end face 231 of the size adjusting external member 2 at a width of about 8 mm. Furthermore, as shown in FIG. 5, the end portion securing member 3 is provided with a plurality of screw holes 33 (diameter: 5 mm) formed in the first contact portion 311 of the backboard portion 31 at pillar intervals. Furthermore, the forwardly bent portion 32 is provided with a plurality of openings 34 for preventing the accumulation of rain water.

The end portion securing member 3 is secured to the furring strip 13 fixed to the structural body 10 with screws (not shown) inserted through screw holes 33. As shown in FIGS. 1 and 2, between the furring strip 13 and the structural body 10, a front waterproof paper 141, an upper flashing 151, a lower flashing 152, and a rear water proof paper 142 are interposed. The external wall member 2 can be a ceramic external wall member of fired material.

The size adjusting external wall members 20 are disposed, other than the aforementioned flowing side assortment portion 101 connecting with the lower roof 12, at the upper or lower side of the opening portion 16 and overhang portions 103. At respective cut end portions 23 of the size adjusting external wall members 20, the end portion securing members 3 are disposed. The siding boards attachment structure of these portions will be explained in Embodiment 2 and the subsequent Embodiments.

The functions and effects of this embodiment will be explained. In the aforementioned siding boards attachment structure 1, the cut end portion 23 of the size adjusting external wall member 20 is secured to the structural body 10 using the aforementioned end portion securing member 3. Accordingly, it is not required to execute nailing operations at the cut end portion 23. This can secure the excellent external appearance design. In other words, since all of external wall members 2 including the cut end portion 23 of the size adjusting securing member 20 can be secured with members (securing members 5 and end portion securing members 3, excellent appearance can be obtained.

Furthermore, since securing members can also be applied to the cut end portion 23, it is not required to execute later patching coating required in the case of nailing, resulting in improved construction efficiency and decreased construction costs. Furthermore, since there is no fear to cause damages to the siding boards or external wall member 2, the weather resistance of the external wall member 2 can be secured sufficiently.

Furthermore, since the securing member 5 and the end portion securing member 3 are secured to the structural body 10 via furring strips 13, a sufficient ventilation layer 18 can be formed at the rear side of the external wall member 2. This makes it possible to obtain a siding boards attachment structure 1 more excellent in durability.

Since the backboard portion 31 of the end portion securing member 3 and the base plate portion 51 of the securing member 5 have approximately the same front-to-rear width, the size adjusting external wall member 20 can be secured to the structural body 10 in parallel without causing any uneven portions.

Furthermore, the external wall member 2 is a ceramic series external wall member made of fired material. In the case of such fired material, since it is difficult to execute the nailing, the functions and effects of the present invention using the present invention can be exerted sufficiently.

As mentioned above, this embodiment can provide siding boards attachment structure excellent in external appearance, weather resistance and construction efficiency.

Embodiment 2

As shown in FIGS. 7 and 8, this embodiment is directed to a siding boards attachment structure 1 for the assortment portion 102 at the building side of the lower roof 12.

That is, at the cut end portion 23 of the size adjusting external wall member 20 disposed at the assortment portion 102, the end portion securing member 3 is disposed. In this embodiment, a front waterproof paper 141, one sheet of flashing 15 and a rear waterproof paper 142 are interposed between the furring strip 13 and the structural body 10. The remaining structure is the same as in Embodiment 1.

According to this embodiment, at the assortment portion 102 at the building side of the lower roof 12, the external appearance, weather resistance and construction efficiency can be enhanced. The same functions and effects as in Embodiment 1 can be realized.

Embodiment 3

As shown in FIGS. 9 and 10, this embodiment is directed to a siding boards attachment structure 1 for the upper side of the opening portion 16 such as a window. That is, at the cut end portion 23 of the size adjusting external wall member 20 disposed above the opening portion 16, the end portion securing member 3 is disposed.

At the upper side of the opening portion 16, a sash 161 is disposed. Above the sash 161, a horizontal furring strip 132 and a size adjusting external wall member 20 are disposed. This size adjusting external wall member 20 is cut along the configuration of the opening portion 16. The cut end portion 23 is disposed above the opening portion 16. Along the cut end portion 23, the end portion securing members 3 are disposed.

Between the cut end portion 23 and the sash 161, a sealing agent 163 is cast. Behind the sealing agent 163, a backup material 164 is disposed. Furthermore, a waterproof paper 14 is disposed between the horizontal furring strip 132 and the structural body 10 and a waterproof tape 165 is pasted so as to bridge the sash 161 and the structural body 10 so that infiltration of rain water is prevented. The remaining structure is the same as in Embodiment 1.

According to this embodiment, at the upper side of the opening portion 16, the external appearance, weather resistance and construction efficiency can be enhanced. The same functions and effects as in Embodiment 1 can be exerted.

Embodiment 4

As shown in FIGS. 11 and 12, this embodiment is directed to a siding boards attachment structure 1 for the lower side of the opening portion 16 such as a window. That is, at the cut end portion 23 of the size adjusting external wall member 20 disposed above the opening portion 16, the end portion securing member 3 is disposed.

At the lower side of the opening portion 16, a sash 162 is disposed. Below the sash 162, a horizontal furring strip 132 and a size adjusting external wall member 20 are disposed. The upper portion of the size adjusting external wall member 20 is cut along the configuration of the opening portion 16. The cut end portion 23 is disposed below the opening portion 16. Along the cut end portion 23, the end portion securing members 3 are disposed.

In this case, the end portion securing member 3 is disposed with the forwardly bent portion 32 located above, so that this forwardly bent portion 32 comes into contact with the cut end face 231 of the size adjusting external wall member 20 from the above. In other words, this end portion securing member 3 is disposed upside down with respect to Embodiment 3. Between the cut end portion 23 and the sash 162, a sealing agent 163 is cast. Behind the sealing agent 163, a backup material 164 is disposed. Furthermore, a waterproof paper 14 is disposed between the horizontal furring strip 132 and the structural body 10 and a waterproof tape 165 is pasted so as to bridge the sash 162 and the structural body 10 so that infiltration of rain water is prevented. The remaining structure is the same as in Embodiment 1.

According to this embodiment, at the lower side of the opening portion 16, the external appearance, weather resistance and construction efficiency can be enhanced. The same functions and effects as in Embodiment 1 can be realized.

Embodiment 5

As shown in FIGS. 13 and 14, this embodiment is directed to a siding boards attachment structure 1 for the overhang portion 103. That is, at the cut end portion 23 of the size adjusting external wall member 20 disposed at the overhang portion 103, the end portion securing member 3 is disposed.

At the overhang portion 103, an eave ceiling member 171 is disposed to the ceiling portion. At the front portion of the eave ceiling member 171, an overhang underthroating 172 is disposed. Above the overhang underthroating 172, the vertical furring strip 131 and the size adjusting external wall member 20 are disposed. Along the cut end portion 23, the end portion securing members 3 are disposed. A waterproof paper 14 is disposed between the furring strip 13 and the structural body 10. The remaining structure is the same as in Embodiment 1.

According to this embodiment, at the overhang portion 103, the external appearance, weather resistance and construction efficiency can be enhanced. The same functions and effects as in Embodiment 1 can be obtained.

The present invention can also be applied to any portion of a building so long as a size adjusting external wall member having a cut end portion can be disposed.

While the present invention may be embodied in many different forms, a number of illustrative embodiments are described herein with the understanding that the present disclosure is to be considered as providing examples of the principles of the invention and such examples are not intended to limit the invention to preferred embodiments described herein and/or illustrated herein.

While illustrative embodiments of the invention have been described herein, the present invention is not limited to the various preferred embodiments described herein, but includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., of aspects across various embodiments), adaptations and/or alterations as would be appreciated by those in the art based on the present disclosure. The limitations in the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the present specification or during the prosecution of the application, which examples are to be construed as non-exclusive. For example, in the present disclosure, the term “preferably” is non-exclusive and means “preferably, but not limited to.” In this disclosure and during the prosecution of this application, means-plus-function or step-plus-function limitations will only be employed where for a specific claim limitation all of the following conditions are present in that limitation: a) “means for” or “step for” is expressly recited; b) a corresponding function is expressly recited; and c) structure, material or acts that support that structure are not recited. In this disclosure and during the prosecution of this application, the terminology “present invention” or “invention” is meant as a non-specific, general reference and may be used as a reference to one or more aspect within the present disclosure. The language present invention or invention should not be improperly interpreted as an identification of criticality, should not be improperly interpreted as applying across all aspects or embodiments (i.e., it should be understood that the present invention has a number of aspects and embodiments), and should not be improperly interpreted as limiting the scope of the application or claims. In this disclosure and during the prosecution of this application, the terminology “embodiment” can be used to describe any aspect, feature, process or step, any combination thereof, and/or any portion thereof, etc. In some examples, various embodiments may include overlapping features. In this disclosure and during the prosecution of this case, the following abbreviated terminology may be employed: “e.g.” which means “for example;” and “NB” which means “note well.” 

1. A siding boards attachment structure in which a plurality of external wall members are secured to a structural body of a building with securing members in a rabbet joint manner, comprising: the securing member being secured to the structural body in a state in which an upper side lower-ledge formed at an upper edge of the external wall member to be disposed at an internal side is engaged with a lower side upper-ledge formed at a lower edge of the external wall member to be disposed at an external side, a size adjusting external wall member having a cut end portion for adjusting its width among the plurality of external wall members with the cut end portion being secured to the structural body with an end portion securing member, the end portion securing member being provided with a backboard portion to be secured to the structural body and a forwardly bent portion forwardly bent from one edge of the backboard portion, and the backboard portion of the end portion securing member being in contact with a rear side surface of the size adjusting external wall member and the forwardly bent portion of the end portion securing member is in contact with the cut end face of the size adjusting external wall member, wherein the backboard portion and the rear side surface of the size adjusting external wall member are bonded to each other with an adhesive agent.
 2. The siding boards attachment structure as recited in claim 1, wherein the cut end portion of the size adjusting external wall member is inclined with respect to a right and left width direction of the size adjusting external wall member, and wherein the end portion securing member is disposed along the cut end portion in an inclined state with respect to the right and left width direction of the size adjusting external wall member.
 3. The siding boards attachment structure as recited in claim 2, wherein the size adjusting external wall member is disposed at a flowing side assortment portion connecting with a lower roof of a building, and wherein the cut end portion of the size adjusting external wall member is secured to the structural body with the end portion securing member.
 4. The siding boards attachment structure as recited in claim 1, wherein the size adjusting external wall member is disposed at a building side assortment portion connecting with a lower roof of the building, an upper or lower side of an opening portion, or an overhang portion, and wherein the cut end portion of the size adjusting external wall member is secured to the structural body with the end portion securing member.
 5. The siding boards attachment structure as recited in claim 1, wherein the securing member and the end portion securing member are secured to a furring strip fixed to the structural body.
 6. The siding boards attachment structure as recited in claim 1, wherein the securing member has a base plate portion which comes into contact with the rear side surface of the external wall member, and wherein the backboard portion of the end portion securing member and the base plate portion of the securing member have approximately the same front-to-rear width.
 7. The siding boards attachment structure as recited in claim 1, wherein the external wall member is a ceramic series external wall member made of fired material. 